When Gemma sets a reluctant Malcolm up on a blind date with a teacher at her school, she discovers new details about the origins of her relationship with Dave. Also, Marty helps Calvin and Tina plan for their future.

When the Johnsons' Christmas present for Grover is stolen, Calvin and Dave team up to recover the gift in time for the holiday. Also, a nostalgic Tina tries to get into the Christmas spirit by reviving traditions from when Malcolm and Marty were kids.